Cases of the new flavor were sent to shareholders.

Clear those LaCroix cans off of your desk and make room in your fridge, because there's a brand new flavor of the now-ubiquitous sparkling water on its way to grocery store shelves—and it might be just the thing we need to make summer last forever.

According to Eater, LaCroix shareholders recently received a letter from Big Seltzer in which the powers that be in La Crosse, Wisconsin, announced that Key Lime Sparkling Water would soon be available for purchase. Those lucky shareholders don't have to wait until that auspicious date, however, since LaCroix included a case of the tropical new variety with each letter. (If you suddenly have the urge to invest in LaCroix, the stock symbol is, fittingly, FIZZ.)

LaCroix diehards—LaCroix boix, if you will—may recall that the brand already has a Lime flavor, as well as a Cherry-Lime variety in the flavor-blending Cúrate collection. Worry not: There's evidently room for a third lime-based drink in the LaCroix family. Per Eater, the shareholder letter described the Key Lime seltzer as having a "distinctive aroma and sweet-and-tart flavor," and investors who have already cracked open the new lime green cans have reportedly found the dessert-inspired flavor to be "sweeter" than Lime LaCroix. So while Lime LaCroix can be guzzled with abandon throughout the day, perhaps its Key Lime cousin should be saved as a treat to satisfy your late-night sweet tooth, like a bubbly, zero-calorie dessert wine.

It's unclear whether the shareholders have been sworn to secrecy or if they're still processing the delight that is Key Lime LaCroix, but only a few so far have shared their thoughts with the inquiring minds on social media. One person posted a picture of the flavor's dark green cans, but only commented, "Key Lime! Hey LaCroix fans &fanatics, a case o this arrived w shareholder stuff. Thanks @lacroixwater for sneak peek!" Another investor did offer his opinion of the new drink, however, tweeting, "Key Lime Lacroix is incredible." We're sold.